Entirely. I went from 14 to 7.5 (got it measured by my school's water scale) in just a little over 2 months using clen,t3, and ketosis. Tons of cardio. I went from benching 315 for reps back then to barely getting 225 for 2-3 reps.
I'm in the same boat now 2 years later...I benched 405 for my first time this winter now I'm trying to cut up and suspect my bench will go down drastically.
It can be done without the AAS easily.....unless you are 5'6 260 and 18%, then that's different. But, if you are not so far from your genetic potential it can be done without juice in 12 weeks or with juice in less time, assuming diet and training are in order.
Last year, I went from 14% to 9% in about six weeks....and when I first started I went from 20% to 12% in less than ten weeks, but I lost some muscle, hey I was a beginner!